Is it possible to use hydrogen as fuel without any danger of explosion?

Oct 4 2013:
Hydrogen's explosive properties were never the real problem. Its part of it, but not the real issue. Jet fuel isn't much better from a safety standpoint, and we use that all the time.

The thing is, at current market value, hydrogen is simply more expensive than fossil fuels--abundant doesn't automatically make it cheap. To release hydrogen from the compounds its found in nature, you need to spend energy, and energy costs money. Too much energy to compete with fossil fuels in fact, which simply come cheaper.
It needs to be economical to be implemented. Same reason we haven't switched over to renewable energy sources--bad value for your money in a strictly energy per capital sense.